Mercury-column.



No. 824,304. PATENTED JUNE 26, 1906. J. MAQMAHON & P. WBSLER. MERCURY COLUMN.4

APPLICATION FILED APR. 3, 1906.

UNITED STATES PATENT orario-E.7

JAMES MACMAHON, OF IRVINGTON, AND FREDERICK WESLER, 0F

NEWARK, JERSEY.,

MERCURY-COLUMN., A

Specification of Letters Patent.

Patented June 26, 1906. 1

' Application iledApril S, 1906. Serial No. $139,697.

Columns; and we do hereby declare the following to be a full, clear, Vand exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings', and to figures of reference marked thereon, which form a part of this s eciication.

This device relates to t at class of goods known as mercury-columns that are used -for testing pipes, usually gas-pipes in houses, before the gas is admitted to the pipes to detect any leaks. This articular attachment is used to ascertaint e pressure on the pipes by means of the mercury in a tube of glass that registers on the gage.

Our improvement consists'in a mercur containing bottle or casin that receives t e lower end of the glass tu e and is ada ted to contain the mercury and prevent it om escaping if the device is tipped over.` or is laid down on its side, at the same time allowing the air-pressure from the exterior of the bottle to act on the mercury.

Another new feature is the prevention of dirt land grit getting into the mercr on account of it being inclosed, and a stil further feature is the vent that allows the air to enter the chamber with the mercury, but is designed to shed the mercury and prevent its escape.

We also show in our construction a peculiar situation of the vent fromthe air-pipe to the chamber containing the mercury-containing bottle, so that it can be easily cleaned.

In the drawings, Figure 1 is a part elevation and part section of our improved mercu -column. Fig. 2 is a section on line 2 2 in Iig. 1, and Fig. 3 is a detail section of the vent in the mercury-containing bottle.

,The body of the device is as usual and comprises the cylindrical portion 10 'and the transverse casing 11, on this latter being attached the nozzle 12, to which is secured in practice a tube leading from a compressedair supply, such as a sure required. v

The valve 13 is arranged as shown, being actuated by the handle 14, this valve shutting off orfopening communication with the duct or bore and the end widening out yat the outlet portion I16 that in use it screws onto the gas-pipe system to ybe tested and when not in use can be stopped up to the plug 17. This arrangement of pipes permits the filling lof the gas-pipe s stem of a house, and the pressure passes ack through an inclined duct 18 to within the chamber 19`of the casing 10. In the upper part of this casing is fitted the reduced screw-threaded neck 20 of the bottle or receptacle 21, that is preferably made of metal, and has on its lower end they rectangular piece '22 for thereception of a wrench.

The whole device is inclosed by screwing in place the cap 23 to the casin 10. proximate] midway up the side o the bott e 21 is place the tip 24, thatvis provided with an opening or vent 25,- which is made smaller atis inner end, as at 26, and emerges from the end 27 of the tip 24. This end 27 is preferably made conical, as shown, so as to pump, to give the presshed the mercury, which on account of its consistency will easily roll 0E, and enough is not required in the cup to exceed in depth the height of the tip 24 when the device is laid on its side.

The stuiling-box 28 along'with the washers 29 arid the tube 30 make an air-tight joint at the top of the bottle 21, and theusual -groove 31 in the bottom of theI tube 30 allows the mercury to have access to the bore of the tube. I A ca 32 holdsithe washer 33 on the top of the tube 30,A and aca iece 34, screwed down on the sleeve 35,Ihol)ds the washer 33 tightlydown on the top, so that while the joint is tight the sleeve 35 can still be turned ,around'on the tube 30, so that if the device It will thus be seen that the inclosing of the mercury in the bottle 21 prevents its being spilled Whenthe device is tipped over,

- and 1t also prevents dirt being forced back through the vent 18 into the mercury, which is thecase Where the mercury is placed right inside the casing '10 in a cup set into the cap '2.3. The position ofthe vent 18 also allows a ready insertion of Wire to clean it when the device is removed from the pipe system.

Having .thus described our invention, what We claim s?- l1.. In a device ofthe kind described7 comprising a casin having an 4air-tight closure embracing a tu e, said tube projecting into the casin a sleeve surrounding the tube, a cap on t e outer end of the tube, and a screw-threaded cap turning on the irst mentioned cap and secured to the end ofthe sleeve.

2. -In a device of the kind described; a casing having means of attachment to an airsupply, means for attachment to a` pipe system, ductsconnecting the air-supply to the means for attachment for. a pi e system, a chamber in the casing, a bott e secured to the casing inside the chamber, a ,tube ro'- jecting into the bottle and emerging om the casing, means for closing the* outer end of the tube, an inclined duct connecting the chamber with means of communication be" tween the air-supply and the pipe-connect-v ing means, and a tip arranged in the bottle `intermediate of its ends, said tip projecting inside .the bottle and havin a perforation therein, saidv tip also having its end ointed.

3. In a device ofthe kind describe a bottle having means on one end for attachment to a casing, and a tip arranged lin the bottle,

said tip havin a perforation, said perforation being sma 1er atits inner end, said tip also having its inner end conical. 4. A device of'the;.kind described, com'- rising a casing having a ca on one end, a ottle Within the casing an top of the casing, a tube Ihaving one end in the bottle, and emerging from the casing, an inwardly-projecting perforated tip in the Wall ofthe bottle intermediate of its ends, and means on the bottom of the bottle for turning it.

In testimony that We claim the fore oing We have hereunto set our hands this 2 day of April, 1906.

JAMES MACMAHON.

FREDERICK `WESLER.

Witnesses:

WM. H. CAMFIELD, l E. A. PELL.

secured to the 

